Adjustable clamp



llmetcnted dan@ tilt,

@ein n We tl i am j W nu i i i will anins'raniln etant.

`ippli'ieaton filed April i7,

To la-ZZ filo from it may conce/Mi lie it known i that -der ll. llinvnlnn a citizen oit the United States ot iinerictn residing at San Antonioj in the county ot llenar and State oi T nas, liasinvented new "and "useful improvements in Adjustable lillainps, ot which the 'tollowing is a specilication. i i

'.lhe object ot the invention is to provide a simple and eiticient clamp tor use in conncction ivith molding bo-nes, caissons or terms such `share used in connection with concrete or cement building operations and the likev aswa means ot facilitating the assembling and removal ot the forms with the minimum fexjlienditure olf time and eilort and withoutthat injury to the torina which is incident to the useoi` nails or spikes and similar relatively permanent securing means commonly used in this connection; and with this object in view the invention consists in a construction and combination of parts oi" which a preferred embodiment is shown in the accompanying drawings, wherein z* `fl3`igure l is a plan view ot a clamp eniliiodying the invention applied in the operative position to a concrete molding term.

Figure 2 is a side view oit the same.

liigure 3 is a perspective view oli` one of the ttulcruni. blocks provided with a pronged j atv.

'lhe clamp consists essentially oit a plurality ot loops or corner elements i() designed to engage the corners or angles of the brace members 1i ot a Ytorni such as that indicated at l2, said corner elements being con* nected in series by interposed linked elements which are adjustable in length by reason oit embodying any desired or required number ot links constituting chains, one ot the linlred members including a fastener by Whi ch the required tension may be applied to the structure to hold the parts of the torni i in their proper relative positions.

Each adjustable member `consisting sentially of chain linlts 13 as above indicated provided with terminal ulcruin bloclrs 'lV/i; and l5 having a llat inner suriface to bear against the sur'l'ace oit the torin bar lll and having a transverse opening` lo constitutingn a bearing ttor the adjacent endet a corner loop l0. At the inner end ot' each i'ulcrurn block there is provided means for connection of the adjacent end ot the connecting chain formed by the links 13, the block ll; having an opening 17 ttor engagement by a terminal 192252. ruSerial No. 554,293.

swivel linlt` 18 at one end ot said chain, and

@be bioclr` lo lniving a pronged aw 19 tor eigagenient with a linlr ofthe chain, so that .n order to vary .the interval between tivo caring bloclts and thus vary the length ot' l, a side oli the clamp7 tosuit the dimensions ot the termin connection with which the clamp to be used, only necessary to engagea different linli ci tlieconnecting chain with the jaw ot one oi said bearing blocks-` ln this way a single clamp composed essentially abi'ive indicated may be adapted to lit terms having a. inensions.

'l`l1e fastening device consists ot a lever E20 relatively Wide range -ot di- `inici-nnied as at 2l upon the inner end oi one oill the bearing blocks shown at la and cin'ref-iponding in construction with the block as above described and a hook member 22 `pivotally connected as at Qbto the lever and having engagei'nent at its nose 24- ivith a selected linl; ct' one of the connecting chains7 the pivotal points 2l and 23 being so ar ranged relative to the line oit' strain between thetrm bearing blocks at the side et the clamp which carries the 'taste/ner, that when the lever in the position indicated in l `gure l. an eccentric or dead center lock j nw'ivided by reason ot' the pivotal point 23 being outside oi a straight ine drawn connecting the pivotal point 2?, with the link engaged with the nose 2d.

'libris in eiievt the clamp embodies a plu rality oit corner loops adapted ttor arrangenient in oblique spanning relation with the corner et a tranie and connected by side members consisting of chains having adjustable connection with the loops through the selective engageability oit the links ot said chains with jaws carried by the loops, and the adaptation in the matter of di niensions ot `a clamp ot this construction to the torni. in connection with which it is to be used can be accomplished without the use ot tools and `under such conditions as to insure subjecting the torni toa compres sive strain which Will insure retaining its members in proper relative positions 'until the cement has become` The release ot the clamps and ends oit the elements ot the 'forni tor use in connection with a subsequent operation can be accomplished merely by movingl the lever oil? the fastener outward suiliciently to break the eccentric lock which has beenproduced in the application or the tastener.

llO

' Connected Having described the invention, what is claimed as neW and useful is p l. A clamp for the :purpose indicated having a series of oornerloops connectedv by interposed side members7 one of 'which includes a fastener havin.O means for effecting an eccentric or dead center lock.

2. A clamp having a series of corner "loops connected by'` interposed side members having4 adjustable connection at one end `With the'edjacentloop, 'and a faste-ner for l`applying tensile strain. to the connected series of'links.

A clamp 'having e seriesiof'corner loops connected by 'interposed side ymnn'bers hevig'a-dj'ustab'le connection at one end With the adjacentloop, 'andv zi fastener' for applying 1 tensile' strain' tothe connected series of links, bearing blocks 'being interposedr between the v'extremities of the side members and said floo'ps.

4. A clamp having aseries of corner loops interposed.' side members having adji'istable connection at one end with the 'edjlcent loop, end a fastener for applying tensile strain to the comiedted series of links`r bearing blocks being interposed between the extremities of the side members and said loops, Vund the side members consisting oi cheinsof which the links are selectively e11- gageeble with jews on seid bearing blocks.

:3. i clamp having corner loops connected in series by interposed flexible side members and including :t fastening device for applying` tensile strain thereto, euch side member nal `nose 'lorengaging the adjacent side member.

In testimony whereofihe afixes his signature.

ROY H. LINVI'LLE. 

